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Extension > Garden > Diagnose a problem > What insect is this? > Garden Pests > Beetles, bugs, ants, and other insects without obvious wings - 1/4 inch - 1/2 inch long > Red-necked cane borer

Red-necked cane borer
Photo Credit: Susan Ellis, Bugwood.org Red-necked cane borer
Photo Credit: Jeff Hahn, Univ. of MN

Red-necked cane borer Agrilus ruficolllis
Size: 1/4 inch long

Where/When: Found on Raspberry and blackberry in late May or early June.

Significance: Affected cane may die or break off at swollen point.
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